SUMMARYSynchronous zooid formation in Ulva pertusa Kjellman was induced in
excised disks maintained in sterilized seawater at 20°C, 12:12 h L:D cycle and
fluorescent light at 100 μmol photons m 2s 1. Zooids were reieased from mature
disk tissue on the morning of the second or the third day after excision. The
degree of zooid formation was found to be dependent on disk size and the region
of the mo... hiện toàn bộ
SummaryUnlike most other green algae, trebouxiophyceans are predominantly
aerophytic and contain many symbiotic representatives. In recent years, a number
of new terrestrial trebouxiophycean taxa were described from soils, tree bark,
and lichens. The present phylogenetic study reveals three new lineages of
free‐living trebouxiophyceans found in North American desert soil crusts and
proposes new ge... hiện toàn bộ
Victoria López‐Rodas, Eduardo Costas, Emilia Maneiro, Fernando Marvá, Mónica Rouco, Antonio Delgado‐Huertas, Antonio Flores‐Moya
SUMMARYFour species of eukaryotic algae proliferate in the sulfureous, acidic
(pH 3.1) water of the largest geothermal pond on Vulcano Island (southern
Italy). Consequently, this pond constitutes a natural laboratory for analysis of
adaptation by phytoplankters to extremely stressful conditions. To distinguish
between the pre‐selective or post‐selective origin of adaptation processes
allowing the ... hiện toàn bộ